I know its difficult to say, but how long can these laptops last? I know many people still use MacBooks they bought in 2008 etc. Are these new MacBooks just as reliable/durable or has the quality dropped? I hear they are better in the regard they dont have as many moving parts(ssd) and dont have fans. So does that make a difference? Are the MBPs better in that regard? I'm buying a machine, that I'm gonna use for years and want to last. Just looking for some educated advice.